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ESTIMATING SYSTEMS ENGINEERING REUSE WITH THE CONSTRUCTIVE
SYSTEMS ENGINEERING COST MODEL (COSYSMO 2.0)
by
Jared Fortune
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(INDUSTRIAL AND SYSTEMS ENGINEERING)
December 2009
Copyright 2009 Jared Fortune

The Constructive Systems Engineering Cost Model (COSYSMO) is an open, parametric model developed at the University of Southern California Center for Systems and Software Engineering (USC-CSSE) as a tool for estimating the amount of systems engineering effort for a large-scale system. This dissertation presents an improvement to COSYSMO by introducing the ability to account for systems engineering reuse through 1) a framework for the reuse process and 2) a refined characterization of systems engineering reuse.; Complex systems have reached the point where reuse is the norm rather than the exception. In an effort to address increasing complexity while maintaining manageability, systems engineers frequently leverage (or reuse) previously developed systems engineering products (i.e. requirements, test plans, interfaces, etc.) as a means of reducing development schedule, system cost, or risk; however, the effects of reuse have historically been difficult to quantify, and therefore justify. Through past and on-going work at USC-CSSE in systems engineering cost modeling as well as the close relationship between USC-CSSE and its industry affiliates, the need for a systems engineering reuse cost model was identified. COSYSMO 2.0 addresses this need by providing systems engineers with a tool that enables the quantification and rationalization of the effect of reuse. The model has broad usability for and direct applicability to practitioners, and has been validated by both subject matter expert opinion and across over 40 projects at a large and diversified systems engineering organization.; The intellectual contributions of this dissertation are not solely limited to COSYSMO 2.0 as an improvement to COSYSMO and a model for estimating the effect of systems engineering reuse, but also include a) the identification of research gaps in the field of systems engineering, b) the characterization of systems engineering reuse through industry-accepted definitions, and c) the development of a framework and heuristics for how systems engineering organizations can approach and manage reuse.

ESTIMATING SYSTEMS ENGINEERING REUSE WITH THE CONSTRUCTIVE
SYSTEMS ENGINEERING COST MODEL (COSYSMO 2.0)
by
Jared Fortune
A Dissertation Presented to the
FACULTY OF THE GRADUATE SCHOOL
UNIVERSITY OF SOUTHERN CALIFORNIA
In Partial Fulfillment of the
Requirements for the Degree
DOCTOR OF PHILOSOPHY
(INDUSTRIAL AND SYSTEMS ENGINEERING)
December 2009
Copyright 2009 Jared Fortune